William



,WILLIAM MASON, 0F TAUNTON, MASSACHUSETTS.

Letters .Pate'nt'No-f. 7 8,463, dateoZ,June 2,1868.

IMPROVEMENT IN MOUNTING PICKER-STAFPS.

To ALL' WnoM 1r MA?conclusivi y Be it known that I, WYILLIAM'MASOmofTaunton, in the State of Massachusetts, have invented certain new undvuseful Improvements in the Manner of Mounting the Iicker-Staffs forDriving the Shuttle in Power-Loomis; and I do hereby declarethat thefollowing isy a full, clear, and exact description thereof, referencebeing had to the accompanying' drawings, making part of thisspecification, iu whchl 1 Figure 1 isY a vertical section taken in thelongitudinal central plane of tlie rocker of thegpicker-sta. Figure 2,ac'rossvertica-l section taken in the plane of the line A cof iig. 1; andFigure 3 a horizontal section taken in the plane ofthe iine B b of tig.The'same letters indicate like parts in all the figures. i .nl My saidinvention relates to an improvement on the well-known method of mountingpicker-stads on rockers, by which improvement I am .enabled to make'themcheaper than and quite as ofcient as by'any other known mode ofconstruction. v` i In the accompanying drawings, A represents therocker-bed, east with a socket, a, at one end, by which it isattaehed tothe loom. The-upper surface on which the rocker works is,-as usual,straight, in the direction of tlielength, but in the cross-section it ismade concave, of a V-shape, to within a short distance of the outerend,- where it is formed Witlia crosslsemi-eylindricalbox,A Z1, toreceive one/end of a link, to be presently described; and neer themiddle of its length it is, formed with a vertical mortise,e, throughwhich' the stem of the rocker passes, and in which it plays freely. Y

` The rocker B longitudinally is, as usual, in the form ot` a segment ofa circle, but in the cross-section it is 'ntfnn inverted V-shape, to titthe concave ofthe bed.l It h as a short stern or arm, el, which extendsthrough the m'ortisc c in the bed, and by which it is, as usual,connected with a spring, fordra'wing back the picker-steif. The upperpart is suitably formed with an open socket, e, to receive, and in whichissecured by a screw-holt,f,. the lower end of 4the stati'g. Backv oftbe socket e it is formed with a cross semi-cylindrical box, 7i, likethe one, b, at the outer end of the bed A. l

There `is an open link, Ofconsisting oftwo cylindrical journals z'z,connected by side-barsjj.: One of the en'd journals tits and works inthe semi-cylindrical box (3 at the outer end of the bed A, and the otherin the semicylindrical bor; 7L ofthe rocker. 'As the tension or" theusual spring attached to the arm cl ofthe rockertends to draw the rockerin the direction oi the arrow, the link C keeps it in its right place onthe bed, and by reason of its end journals Werking in thesemi-cylindrical boxes, lpermits the required rocking motion to takeplace freely, whilst at the sanneA time the form of the upper surface ofthe bed, and of the undersurtace of the rocker, prevents thepicker-steil` from wabbfling or moving sidewisc. i

Y Bythe mode of construction above described, I ain enabled to make the'whole structure ot' three pieces, the bed A, the rocker Bfand the openlink C, each of which can be readily cast, and thc three put together,and used without any finish beyond the usual cleaning operation towhich-castings are subjected.

What I'elaim as my invention, and desireto secure by Letters Patent, asan improvement on the well-known picker-staff rocker, isv v The bed,formed with a V-shaped groove, and the rocker, with its under surfaceofthe corresponding form, in combination with the open link, by whichthe rocker is kept in place on the bed, substantially as and for thepurpose set forth. v

WM. MASON. Witnesses CHARLES R. OLNEY, WM. H. BENT.

